Therefore, the detection of BRCA1 and BRCA2 gene mutation will be valuable for the prognosis of breast cancer.

通过检测乳腺癌患者BRCA1和BRCA2基因的突变情况，将有助于对乳腺癌患者预后的早期评估。

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Scientists from the Centre for Research on Women's Health in Toronto led the study which looked at women with the BRCA1 and BRCA2 gene mutation.

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But for the average breast cancer patient who has neither the BRCA1 or BRCA2 gene mutation nor a close relative with breast cancer (Jolie's mother, for example, died from ovarian cancer), the risk of a new breast cancer in the nonaffected breast is less than 1%.

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